Abstract:Climate in China was at a normal level in 2017 and relatively fewer climate disasters occurred. Annual mean temperature 10.39℃ over China was 0.84℃ higher than normal years. In terms of high temperature, July and September had the highest temperature compared to that in the same periods since 1951, and the day highs at 113 stations broke the historical records. The annual mean precipitation over China was 641.3 mm, which increased 1.8% than normal years. Compared with the normal, precipitation was less in winter and more in summer, and approached normal in spring and autumn. The daily rainfall at 31 stations exceeded historical extremes, of which many stations were found in the areas where torrential rain seldom occurs. Besides, the continuous precipitation at 47 stations exceeded historical extremes. Precipitation in the pre flood season in South China and in rainy season in Southwest China decreased by 9% and 4%, respectively. Precipitation in Meiyu season increased by 6% but was significantly less than that of 2015 and 2016. The rainy season in North China was shortened by 10 days and the rainfall was 28% less than normal. However, the autumn rainfall in West China increased by 49%, getting to the highest since 1984. The rainy season in Northeast China was short with rainfall 14% less than normal. Moreover, rainstorm processes presented frequently, and extremely severely, resulting in great damages. There were more landing typhoons, which were more frequent, concentrated and regionally overlapping. High temperature occurred for more days in China, appearing early in northern China but more intense in sou thern China. The effects of other disasters such as drought, freezing, snowstorms, dust in spring and haze were light.